Detector of break of crystals route I remove 433 MHz. Coverage from 3 to 6 m. Height of assembly 1,8 m. Exceptional functioning with a great range of frequencies and excellent capture of slight sounds. Level of eligible sensibility. Totally supervised: Sabotage, Failure, low battery. Supplied with 6 alkaline batteries of the type AA. Dimensions: 58 × 135 × 33 mm.